A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6150-01-075-0726
NSN 5925-00-361-8836
NSN 6150-01-339-0091
NSN 6650-01-119-4576
NSN 6105-00-919-1572
NSN 5835-00-828-9335
NSN 6130-01-166-5032
NSN 5945-01-061-2822
NSN 5935-01-236-4236
NSN 5930-01-035-6830
NSN 5998-00-737-1220
NSN 6110-00-459-4217